Hi
I Also get terrible eye-strain, nausea and headaches from monitors but ONLY when reading text because of pattern glare.
Paragraph and line of text are like a pattern from Figure 4 from this site https://www.opticianonline.net/cpd-archive/171
I also have it when reading on paper but way less.
I did IRLEN testing and got tinted glasses (rose/purple) but it doesn't help. The overlay does help but mainly only on paper.
You guys should look online about IRLEN which is kind of similar to people having pattern glare, it is also sometimes call visual stress.
Opticalm are in this space and made a video that give some really nice recommandation. You can watch it here: https://www.youtube.com/watch?v=rrgAfiVA8Bw